Automatic puncture device for trauma first-aid diversion

The invention discloses a trauma first-aid flow guide automatic puncture device which comprises an ejector and a puncture needle fixator arranged on one side of the ejector, the ejector comprises a top cover and a bottom cover, a protective sleeve is arranged between the top cover and the bottom cover, a sliding block is arranged on the side, facing the puncture needle fixator, of the protective sleeve, and the side, facing the puncture needle fixator, of the protective sleeve is provided with a guide rod. The sliding block is in sliding connection with a sliding groove formed in the side edge of the sheath. An elastic structure used for pushing the sliding block to fall down is arranged in the protective sleeve, and the end, away from the protective sleeve, of the sliding groove is rotationally connected with the puncture needle fixator. A trigger module used for controlling the sliding block to fall down and a non-return module used for preventing the sliding block from rebounding after falling down are arr